A method, device and equipment for scheduling an energy storage system

Abstract

The application relates to a scheduling method, device and equipment of an energy storage system. The scheduling method of the energy storage system determines a target preset power according to the power generation cost of unit power generation of a power station corresponding to the energy storage system. Meanwhile, the limit value of transmission power is determined according to the ratio of the current power of the energy storage system to the target preset power, and then the charging / discharging power of the energy storage system is determined and the charging / discharging control of the energy storage system is performed. Through the above scheduling method, the charging / discharging action of the energy storage system can be matched with the current power, so that the energy storage system is prevented from being operated in a biased manner for charging or discharging, and the service life of the energy storage system is improved.

Description

Technical Field

[0001] This application relates to the field of power energy storage technology, and in particular to a scheduling method, apparatus and equipment for an energy storage system. Background Technology

[0002] With the development of power technology, electricity has become an indispensable energy source in people's daily lives. Currently, power grid systems mainly include thermal power generation, hydropower generation, nuclear power generation, and new energy power generation systems. A power grid system includes generator sets for generating power and generator set controllers for controlling these generator sets. To ensure a fast and stable response to automatic power generation control and dispatch commands, the power grid system also includes energy storage systems to support the operation of the generator sets. The total output provided by the power grid system is the sum of the outputs of the generator sets and the energy storage systems, allowing for complementary advantages between the two systems.

[0003] In existing technologies, the inventors have found that energy storage systems often operate with bias to charge or discharge according to dispatch instructions, resulting in overcharging or over-discharging, which prevents continuous operation. Summary of the Invention

[0004] Therefore, it is necessary to provide a scheduling method, apparatus, and equipment for energy storage systems that avoids damage to the aforementioned technical problems.

[0005] A scheduling method for an energy storage system, comprising:

[0006] Receive scheduling instructions; scheduling instructions include the total charge / discharge amount;

[0007] Obtain the current power of each energy storage system, and the power generation cost per unit of power generated by the power station corresponding to the energy storage system;

[0008] Determine the ratio of the current power of any energy storage system to the target preset power; wherein the target preset power is determined based on the power generation cost;

[0009] The transmission power limit of the energy storage system is determined based on the ratio;

[0010] The charging / discharging capacity of the energy storage system is determined based on the limits of total charging / discharging capacity and transmission power.

[0011] Based on the charging / discharging amount of the energy storage system, control the energy storage system to perform charging or discharging actions.

[0012] The aforementioned energy storage system scheduling method determines the target preset power capacity based on the power generation cost per unit of electricity generated by the power station corresponding to the energy storage system. Simultaneously, it determines the transmission power limit based on the ratio of the current power capacity of the energy storage system to the target preset power capacity, thereby determining the charging / discharging amount of the energy storage system and controlling its charging / discharging. This scheduling method allows the charging and discharging actions of the energy storage system to be matched with the current power capacity, thus avoiding biased operation for charging or discharging, and ultimately improving the lifespan of the energy storage system.

[0013] In one embodiment, the limit includes a first limit and a second limit; the first limit is less than the second limit.

[0014] The steps for determining the transmission power limit of an energy storage system based on the ratio include:

[0015] When charging is in progress and the ratio is less than or equal to the first set value, the second limit is determined as the limit for transmission power.

[0016] When charging is in progress and the ratio is greater than or equal to the second set value, the first limit is used to determine the limit of the transmission power.

[0017] When charging is in progress and the ratio falls between the first set value and the second set value, a limit for the transmission power is determined based on the first set value, the second set value, the ratio, the first limit, and the second limit.

[0018] In one embodiment, in the step of determining the transmission power limit based on the first set value, the second set value, the ratio, the first limit value, and the second limit value, the transmission power limit is obtained based on the following formula:

[0019]

[0020] Where a is the first set value; b is the second set value; A is the ratio; c is the first limit; d is the second limit; and I is the limit of transmission power.

[0021] In one embodiment, the limit includes a first limit and a second limit; the first limit is less than the second limit.

[0022] The steps for determining the transmission power limit of an energy storage system based on the ratio include:

[0023] When a discharge is performed and the ratio is less than or equal to a first set value, the first limit is determined as the limit for the transmission power.

[0024] When a discharge is performed and the ratio is greater than or equal to the second set value, the second limit is used to determine the limit of the transmission power.

[0025] When a discharge is performed and the ratio falls between a first set value and a second set value, a limit for the transmission power is determined based on the first set value, the second set value, the ratio, the first limit, and the second limit.

[0026] In one embodiment, in the step of determining the transmission power limit based on the first set value, the second set value, the ratio, the first limit value, and the second limit value, the transmission power limit is obtained based on the following formula:

[0027]

[0028] Where a is the first set value; b is the second set value; A is the ratio; c is the first limit; d is the second limit; and I is the limit of transmission power.

[0029] In one embodiment, the target preset electricity volume is inversely proportional to the power generation cost.

[0030] In one embodiment, the power station corresponding to the energy storage system is one of the following: a wind power station, a thermal power station, a hydropower station, or a solar power station.

[0031] A dispatching device for an energy storage system, comprising:

[0032] The receiving module is used to receive scheduling instructions; the scheduling instructions include the total charge / discharge amount.

[0033] The acquisition module is used to acquire the current power of each energy storage system and the power generation cost per unit of power generated by the power station corresponding to the energy storage system.

[0034] The ratio determination module is used to determine the ratio of the current power of any energy storage system to the target preset power; wherein, the target preset power is determined based on the power generation cost.

[0035] The limit determination module is used to determine the limit of the transmission power of the energy storage system based on the ratio.

[0036] The charge / discharge quantity determination module is used to determine the charge / discharge quantity of the energy storage system based on the total charge / discharge quantity and the transmission power limit.

[0037] The control module is used to control the energy storage system to perform charging or discharging actions based on the charging / discharging amount of the energy storage system.

[0038] A computer device includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described method.

[0039] A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the above method. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a flowchart illustrating a scheduling method for an energy storage system in one embodiment;

[0042] Figure 2 This is a first schematic flowchart of the steps for determining a limit value of the transmission power of an energy storage system based on a ratio in one embodiment;

[0043] Figure 3 This is a second schematic flowchart of the steps for determining the transmission power limit of the energy storage system based on a ratio in one embodiment;

[0044] Figure 4 This is a structural block diagram of the scheduling device of an energy storage system in one embodiment. Detailed Implementation

[0045] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0047] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0048] In one embodiment, such as Figure 1 As shown, a scheduling method for an energy storage system is provided, including:

[0049] S110, Receive scheduling instructions; the scheduling instructions include the total charge / discharge amount;

[0050] In urgent situations, dispatchers can schedule and issue corresponding dispatch instructions to the energy storage system, including charging, discharging, shutdown, and total charging / discharging volume, to assist in formulating energy storage dispatch instructions.

[0051] S120: Obtain the current power of each energy storage system and the power generation cost per unit of power generated by the power station corresponding to the energy storage system.

[0052] The current battery level can be detected by a monitoring unit.

[0053] Specifically, calculations can be performed directly using data acquired from sensors, such as voltage and current, or by directly reading the current power level of each energy storage system from the backend. Each energy storage system corresponds one-to-one with a power plant and is connected to the power grid; that is, each power plant or power plant in each region corresponds to one energy storage system. The power plant corresponding to the energy storage system is one of the following types: wind power plant, thermal power plant, hydropower plant, or solar power plant. This means that each type of power plant has different power generation costs at different times; the aforementioned power generation cost represents the power generation cost at the current time.

[0054] S130, determine the ratio of the current power of any energy storage system to the target preset power; wherein, the target preset power is determined based on the power generation cost;

[0055] Specifically, the target preset power volume is determined based on the power generation cost. In one embodiment, the target preset power volume is inversely proportional to the power generation cost. For example, at any given time, if the power generation cost of a certain power station is higher, its target preset power volume will be adjusted downwards or upwards accordingly, while if the power generation cost of another power station is lower, its target preset power volume will be adjusted upwards or downwards accordingly. Specifically, a baseline target power volume and a baseline power generation cost are preset, and then the power generation cost of each energy storage system corresponding to the power station is determined at the current time. Based on the power generation cost and the baseline power generation cost, the target preset power volume is adjusted upwards or downwards accordingly under the standard of the baseline target power volume. It should be noted that the setting of the target preset power volume differs when discharging and charging. When charging, if the power generation cost of a certain power station is higher, its target preset power volume will be adjusted downwards accordingly; if the power generation cost of that power station is lower, its target preset power volume will be adjusted upwards accordingly. When discharging, if the power generation cost of a certain power station is higher, its target preset power volume will be adjusted upwards accordingly; if the power generation cost of that power station is lower, its target preset power volume will be adjusted downwards accordingly.

[0056] S140, determine the limit of the transmission power of the energy storage system based on the ratio;

[0057] S150, determine the charge / discharge amount of the energy storage system based on the limits of total charge / discharge and transmission power;

[0058] Specifically, after determining the transmission power limit and total charge / discharge amount for each energy storage system, the charge / discharge amount can be allocated to each system. It should be noted that the charge / discharge amount for each energy storage system mentioned above refers to the amount charged / discharged at any given moment, or it could refer to the amount charged / discharged over a time period; no specific limitation is made here.

[0059] S160 controls the energy storage system to perform charging or discharging actions based on the charging / discharging amount of the energy storage system.

[0060] Specifically, once the transmission power limit for each energy storage system is obtained, charging or discharging can be performed within that limit. In a specific example, the energy storage system performs charging or discharging operations within the transmission power limit to ensure coordinated operation of multiple energy storage systems, i.e., simultaneous charging or discharging.

[0061] The aforementioned energy storage system scheduling method determines the target preset power capacity based on the power generation cost per unit of electricity generated by the power station corresponding to the energy storage system. Simultaneously, it determines the transmission power limit based on the ratio of the current power capacity of the energy storage system to the target preset power capacity, thereby determining the charging / discharging amount of the energy storage system and controlling its charging / discharging. This scheduling method allows the charging and discharging actions of the energy storage system to be matched with the current power capacity, thus avoiding biased operation for charging or discharging, and ultimately improving the lifespan of the energy storage system.

[0062] In one embodiment, the limit includes a first limit and a second limit; the first limit is less than the second limit.

[0063] like Figure 2 As shown, the steps for determining the transmission power limit of an energy storage system based on the ratio include:

[0064] S210, when charging is in progress and the ratio is less than or equal to the first set value, the second limit is determined as the limit for transmission power;

[0065] S220, when charging is in progress and the ratio is greater than or equal to the second set value, the first limit is determined as the limit of the transmission power;

[0066] S230, when charging is in progress and the ratio falls between the first set value and the second set value, a limit value for the transmission power is determined based on the first set value, the second set value, the ratio, the first limit value, and the second limit value.

[0067] In one embodiment, in the step of determining the transmission power limit based on the first set value, the second set value, the ratio, the first limit value, and the second limit value, the transmission power limit is obtained based on the following formula:

[0068]

[0069] Where a is the first set value; b is the second set value; A is the ratio; c is the first limit; d is the second limit; and I is the limit of transmission power.

[0070] In one embodiment, the limit includes a first limit and a second limit; the first limit is less than the second limit.

[0071] like Figure 3 As shown, the steps for determining the transmission power limit of an energy storage system based on the ratio include:

[0072] S310, when discharging occurs and the ratio is less than or equal to the first set value, the first limit is determined as the limit of the transmission power;

[0073] S320, when discharging occurs and the ratio is greater than or equal to the second set value, the second limit is determined as the limit of the transmission power;

[0074] S330, when discharging occurs and the ratio falls between the first set value and the second set value, a limit value for the transmission power is determined based on the first set value, the second set value, the ratio, the first limit value, and the second limit value.

[0075] In one embodiment, in the step of determining the transmission power limit based on the first set value, the second set value, the ratio, the first limit value, and the second limit value, the transmission power limit is obtained based on the following formula:

[0076]

[0077] Where a is the first set value; b is the second set value; A is the ratio; c is the first limit; d is the second limit; and I is the limit of transmission power.

[0078] In the above method for determining the transmission power limit, when executing a charging command, if the power generation cost is high, the target preset power capacity is lowered to increase the ratio, thereby further reducing the transmission power limit; conversely, if the power generation cost is low, the target preset power capacity is raised to decrease the ratio, thereby further increasing the transmission power limit. Similarly, when executing a discharging command, if the power generation cost is high, the target preset power capacity is raised to decrease the ratio, thereby further reducing the transmission power limit; conversely, if the power generation cost is low, the target preset power capacity is lowered to increase the ratio, thereby further increasing the transmission power limit. This method reduces the operating cost of the energy storage system. It should be noted that the transmission power also has a standard upper limit, and the above-mentioned transmission power limits are all lower than this standard upper limit.

[0079] It should be understood that, although Figure 1 The steps in flowchart -3 are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise explicitly stated herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Furthermore, Figures 1-3 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0080] In one embodiment, such as Figure 4 As shown, a scheduling device for an energy storage system is provided, comprising:

[0081] The receiving module is used to receive scheduling instructions; the scheduling instructions include the total charge / discharge amount.

[0082] The acquisition module is used to acquire the current power of each energy storage system and the power generation cost per unit of power generated by the power station corresponding to the energy storage system.

[0083] The ratio determination module is used to determine the ratio of the current power of any energy storage system to the target preset power; wherein, the target preset power is determined based on the power generation cost.

[0084] The limit determination module is used to determine the limit of the transmission power of the energy storage system based on the ratio.

[0085] The charge / discharge quantity determination module is used to determine the charge / discharge quantity of the energy storage system based on the total charge / discharge quantity and the transmission power limit.

[0086] The control module is used to control the energy storage system to perform charging or discharging actions based on the charging / discharging amount of the energy storage system.

[0087] Specific limitations regarding the scheduling device of the energy storage system can be found in the limitations of the scheduling method of the energy storage system mentioned above, and will not be repeated here. Each module in the aforementioned energy storage system scheduling device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module. It should be noted that the module division in this embodiment is illustrative and only represents a logical functional division; other division methods may be used in actual implementation.

[0088] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0089] Receive scheduling instructions; scheduling instructions include the total charge / discharge amount;

[0090] Obtain the current power of each energy storage system, and the power generation cost per unit of power generated by the power station corresponding to the energy storage system;

[0091] Determine the ratio of the current power of any energy storage system to the target preset power; wherein the target preset power is determined based on the power generation cost;

[0092] The transmission power limit of the energy storage system is determined based on the ratio;

[0093] The charging / discharging capacity of the energy storage system is determined based on the limits of total charging / discharging capacity and transmission power.

[0094] Based on the charging / discharging amount of the energy storage system, control the energy storage system to perform charging or discharging actions.

[0095] In one embodiment, when the processor performs the step of determining the transmission power limit of the energy storage system based on the ratio, it also performs the following steps:

[0096] When charging is in progress and the ratio is less than or equal to the first set value, the second limit is determined as the limit for transmission power.

[0097] When charging is in progress and the ratio is greater than or equal to the second set value, the first limit is used to determine the limit of the transmission power.

[0098] When charging is in progress and the ratio falls between the first set value and the second set value, a limit for the transmission power is determined based on the first set value, the second set value, the ratio, the first limit, and the second limit.

[0099] In one embodiment, when the processor performs the step of determining the transmission power limit of the energy storage system based on the ratio, it also performs the following steps:

[0100] When a discharge is performed and the ratio is less than or equal to a first set value, the first limit is determined as the limit for the transmission power.

[0101] When a discharge is performed and the ratio is greater than or equal to the second set value, the second limit is used to determine the limit of the transmission power.

[0102] When a discharge is performed and the ratio falls between a first set value and a second set value, a limit for the transmission power is determined based on the first set value, the second set value, the ratio, the first limit, and the second limit.

[0103] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0104] Receive scheduling instructions; scheduling instructions include the total charge / discharge amount;

[0105] Obtain the current power of each energy storage system, and the power generation cost per unit of power generated by the power station corresponding to the energy storage system;

[0106] Determine the ratio of the current power of any energy storage system to the target preset power; wherein the target preset power is determined based on the power generation cost;

[0107] The transmission power limit of the energy storage system is determined based on the ratio;

[0108] The charging / discharging capacity of the energy storage system is determined based on the limits of total charging / discharging capacity and transmission power.

[0109] Based on the charging / discharging amount of the energy storage system, control the energy storage system to perform charging or discharging actions.

[0110] In one embodiment, when the step of determining the transmission power limit of the energy storage system based on the ratio is executed by the processor, the following steps are also performed:

[0111] When charging is in progress and the ratio is less than or equal to the first set value, the second limit is determined as the limit for transmission power.

[0112] When charging is in progress and the ratio is greater than or equal to the second set value, the first limit is used to determine the limit of the transmission power.

[0113] When charging is in progress and the ratio falls between the first set value and the second set value, a limit for the transmission power is determined based on the first set value, the second set value, the ratio, the first limit, and the second limit.

[0114] In one embodiment, when the step of determining the transmission power limit of the energy storage system based on the ratio is executed by the processor, the following steps are also performed:

[0115] When a discharge is performed and the ratio is less than or equal to a first set value, the first limit is determined as the limit for the transmission power.

[0116] When a discharge is performed and the ratio is greater than or equal to the second set value, the second limit is used to determine the limit of the transmission power.

[0117] When a discharge is performed and the ratio falls between a first set value and a second set value, a limit for the transmission power is determined based on the first set value, the second set value, the ratio, the first limit, and the second limit.

[0118] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0119] For software implementation, the techniques described herein can be implemented by units that perform the functions described herein. The software code can be stored in memory and executed by a processor. The memory can be implemented in the processor or external to the processor.

[0120] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0121] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0122] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0123] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0124] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0125] If the aforementioned function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks. It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In the absence of further restrictions, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0126] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A scheduling method for an energy storage system, characterized in that, include: Receive scheduling instructions; The scheduling instructions include the total charge / discharge amount; Obtain the current power of each energy storage system, and the power generation cost per unit of power generated by the power station corresponding to the energy storage system; Determine the ratio of the current power of any of the energy storage systems to a target preset power; wherein the target preset power is determined based on the power generation cost; The transmission power limit of the energy storage system is determined based on the ratio. The charge / discharge amount of the energy storage system is determined based on the total charge / discharge amount and the transmission power limit. The energy storage system is controlled to perform charging or discharging actions based on the amount of charge / discharge.

2. The scheduling method for an energy storage system according to claim 1, characterized in that, The limit includes a first limit and a second limit; the first limit is less than the second limit; The step of determining the transmission power limit of the energy storage system based on the ratio includes: When charging is in progress and the ratio is less than or equal to the first set value, the second limit is determined as the limit for the transmission power; When charging is in progress and the ratio is greater than or equal to the second set value, the first limit is used to determine the limit of the transmission power. When charging is in progress and the ratio falls between the first set value and the second set value, a limit value for the transmission power is determined based on the first set value, the second set value, the ratio, the first limit value, and the second limit value.

3. The scheduling method for an energy storage system according to claim 2, characterized in that, In the step of determining the limit of the transmission power based on the first set value, the second set value, the ratio, the first limit value, and the second limit value, the limit of the transmission power is obtained based on the following formula: Wherein, a is the first set value; b is the second set value; A is the ratio; c is the first limit; d is the second limit; and I is the limit of the transmission power.

4. The scheduling method for an energy storage system according to claim 1, characterized in that, The limit includes a first limit and a second limit; the first limit is less than the second limit; The step of determining the transmission power limit of the energy storage system based on the ratio includes: When a discharge is performed and the ratio is less than or equal to a first set value, the first limit is determined as the limit for the transmission power. When a discharge is performed and the ratio is greater than or equal to a second set value, the second limit is used to determine the limit of the transmission power. When a discharge is performed and the ratio falls between the first set value and the second set value, a limit value for the transmission power is determined based on the first set value, the second set value, the ratio, the first limit value, and the second limit value.

5. The scheduling method for an energy storage system according to claim 4, characterized in that, In the step of determining the limit of the transmission power based on the first set value, the second set value, the ratio, the first limit value, and the second limit value, the limit of the transmission power is obtained based on the following formula: Wherein, a is the first set value; b is the second set value; A is the ratio; c is the first limit; d is the second limit; and I is the limit of the transmission power.

6. The scheduling method for an energy storage system according to claim 1, characterized in that, The target preset power generation is inversely proportional to the power generation cost.

7. The scheduling method for an energy storage system according to claim 1, characterized in that, The power station corresponding to the energy storage system is one of the following: wind power station, thermal power station, hydropower station, or solar power station.

8. A dispatching device for an energy storage system, characterized in that, include: The receiving module is used to receive scheduling instructions; The scheduling instructions include the total charge / discharge amount; The acquisition module is used to acquire the current power of each energy storage system and the power generation cost per unit of power generation of the power station corresponding to the energy storage system. A ratio determination module is used to determine the ratio of the current power of any of the energy storage systems to a target preset power; wherein the target preset power is determined based on the power generation cost; A limit determination module is used to determine the limit value of the transmission power of the energy storage system based on the ratio. A charge / discharge quantity determination module is used to determine the charge / discharge quantity of the energy storage system based on the total charge / discharge quantity and the transmission power limit. The control module is used to control the energy storage system to perform charging or discharging actions based on the charging / discharging amount of the energy storage system.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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